Roughly three minutes after clearing the pad, Heavy's two side boosters separated from the core rocket for a synchronised landing at the Cape Canaveral Air Force Station.
The mission will mark the beginning of commercial operations for the Falcon Heavy, the upgraded version of SpaceX's Falcon 9 rocket.
With a total of 27 Merlin engines, the Falcon Heavy is capable of generating "more than 5 million pounds (2.3 million kg) of thrust at liftoff, equal to about eighteen 747 aircraft", according to SpaceX. But since the inaugural flight, SpaceX has added a few more customers to the Falcon Heavy's manifest, including telecommunications company Viasat, along with a few additional launches from the US Air Force. The second most powerful rocket in the United States - the Delta IV Heavy - can send more than 63,000 pounds to the same location. Another successful flight today could help attract more.
The Falcon Heavy had been scheduled to lift off from the Kennedy Space Center on Wednesday but that was delayed because of strong winds in the upper atmosphere.
The fairing is a piece of material that's part of the rocket's nosecone, protecting the payload, which can include things like satellites, during launch.
Arabsat 6A launch from NASA. The company also made history by successfully recovering both of its side boosters and the central core booster, which it had never done before.
The success of the Falcon Heavy is also paramount considering NASA's recent announcement that this rocket system could be used as a backup for future missions to the Moon, should the SLS not be ready in time.
SpaceX has two operational rockets: the Falcon 9, which with 21 launches in 2018 dominates the U.S. market, and the Falcon Heavy, which as its name suggests is created to lift much heavier payloads into more distant orbits. SpaceX's coverage of the flight should begin around 20 minutes before liftoff. While many SpaceX fairings have been pulled from the water over the years and put back into service, the ultimate goal is to avoid having to refurbish the components to deal with corrosion caused by salt water - which is expensive and time-consuming.
Update April 10th, 7:30PM ET: SpaceX delayed the launch to Thursday, April 11th due to high winds.